a) Calculate the chemical potential of solid acetylene at its triple point. The reference state is the saturated liquid at the triple point. 

b) Calculate the change in the chemical potential of the vapor when the pressure is reduced from 1.3 atm to 0.1 atm at the constant temperature of − 84 °C.

c) State and justify your assumptions. 

Additional data at the triple point: T_triple = − 84 °C, P_triple = 1.3 atm, V_solid = 34 cm3/mol, V_liq = 42.7 cm₃/mol, Vvap = 12020 cm₃/mol.